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namespace PagerParser;
public interface ITtsService {
public string GetTtsMessage(ParsedPagerMessage pm);
}
public class TtsService : ITtsService {
public static readonly Dictionary<string, string> IncidentTypeMap = new() {
{ "ALAR", "FIRE ALARM" },
{ "G&S", "GRASS & SCRUB" },
{ "HIAR", "HIGH-ANGLE RESCUE" },
{ "INCI", "INCIDENT" },
{ "NOST", "NON-STRUCTURE" },
{ "RESC", "RESCUE" },
{ "STRU", "STRUCTURE" }
};
private List<Landmark> landmarks;
public TtsService(IConfiguration config) =>
config.Bind("PagerParser:Landmarks", landmarks);
public string GetTtsMessage(ParsedPagerMessage pm) {
// If we have GPS coordinates for the page, check if
// it's near a well-known landmark and include that
// in the TTS message.
string? nearestLandmark = null;
if(pm.GpsPosition is not null)
nearestLandmark = landmarks
.Where(l => pm.GpsPosition.GetDistance(l.Latitude, l.Longitude) < l.Radius)
.OrderBy(l => pm.GpsPosition.GetDistance(l.Latitude, l.Longitude))
.Select(l => l.Name)
.FirstOrDefault();
return string.Join(" ", [
IncidentTypeMap.GetValueOrDefault(pm.JobType) ?? "UNKNOWN ALERT",
pm.Description,
nearestLandmark is null ? null : $"located near {nearestLandmark}",
// TODO: more detailed information on what services have been paged
pm.PagedServices.Count > 0 ? $"{pm.PagedServices.Count} services paged" : null
]).Trim();
}
}
public record Landmark {
public string Name { get; set; }
public double Latitude { get; set; }
public double Longitude { get; set; }
public double Radius { get; set; }
}
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